Sierra 18-3677 Thermostat Kit for Volvo and OMC EnginesSierra high-quality engine parts are designed to meet OEM specifications. 160 Degree Thermostat; Kit Includes: Thermostat; Gasket (18-2917); O-ring (18-7170); Interchangeable with: Mallory; 9-43028; Volvo Penta; 3856961; Fits: OMC 4.3L (1994-97); OMC 4.3L HO (1991-97); OMC 5.0L (1994-97); OMC 5.8L (1994-97); OMC 5.8L EFI (1993-97);